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Truck tire life is normally distributed with a mean of 60,000 miles and a standard deviation of 4,000 miles. You bought four tires. What is the probability that the average mileage of the four tires exceeds 66,000 miles?
Statistics and Probability, Statistics
Find a 95%confidence interval for the population mean, using the formula or technology. Assuming that the population is normally distributed, construct a 95% confidence interval for the population mean, based on the foll ...
Owning a business, what do you see as the biggest challenge or challenges in developing a useful forecasting?
A survey found that people keep their televisions an average of 5.8 years. The standard deviation is 0.76 year. If a person decides to buy a new TV, find the probability that he or she owned the old one for the given amo ...
If a study was done to measure the total brain volume of patients that had schizophrenia and also of patients that are normal. Table 1 has the total brain volume of the normal patients and table 2 has the total brain vol ...
Assume that 15 questions are answered by guessing. 1) What is the probability of exactly 14 correct answers?
DePaul University makes student IDs of length 5 characters by picking 2 letters from D,E,P,A,U,L; no repetitions and the order is not important followed by picking 3 digits from 0,1,2,3,4,5,6,7,8,9; no repetitions and th ...
15.1 15.3 15.2 14.6 14.8 15.2 15 15.2 15 15.4 15.7 14.8 15.4 15.5 14.9 14.9 14.9 15.3 15.5 15.4 15.1 14.7 15.1 14.6 14.7 15.2 15.4 15.4 14.5 15.5 15.1 14.8 14.9 14.6 14.6 15.4 15 15.3 15.5 14.9 15.2 15.2 15 15.1 14.7 14. ...
A group of students made the following scores on a 10-item quiz in psychological statistics: {5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10} What is the variance, treating these scores as a sample?
In 2015, Caterpillar Inc. had about 653 million shares outstanding. Their book value was $32.3 per share, and the market price was $74.00 per share. The company's balance sheet shows that the company had $20.20 billion o ...
One study, based on responses from 1, 013 randomly selected teenagers, concluded that 43% of teenagers cite grades that their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than h ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As